Add dumping provision request functionality

[ Merge of http://go/wvgerrit/179590 ]

Bug: 277788529
Test: dumpsys android.hardware.drm.IDrmFactory/widevine -prov
Change-Id: Ife88d1323bf5ee423eb8827ca324b73db3cc984a
(cherry picked from commit afbfe173a8)

libwvdrmengine/include/WVDrmFactory.h

@@ -60,6 +60,7 @@ class WVDrmFactory : public ::aidl::android::hardware::drm::BnDrmFactory {
   static void printCdmMetrics(int fd);
   static void printCdmProperties(int fd);
   static void printUsage(int fd);
+  static void printProvisioningRequest(int fd, bool cast);
 
   friend class WVDrmFactoryTestPeer;
 };